arboreal vs umbrageous

arboreal

adj
  • Covered or filled with trees. 

  • Of, relating to, or resembling a tree. 

  • Living in or among trees. 

noun
  • Any tree-dwelling creature. 

umbrageous

adj
  • Having shade; shady; having shade provided by thick foliage. 

  • Irritable, easily upset. 

How often have the words arboreal and umbrageous occurred in a corpus of books? (source: Google Ngram Viewer )